Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ExxonMobil Oil Corp
Original Assignee
Frederick Yip-Kwai Lo
Thomas Edward Nowlin
Pradeep Pandurang Shirodkar
Mobil Oil Corporation
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Filing date
Publication date
Priority claimed from US07/457,432external-prioritypatent/US5032562A/en
Application filed by Frederick Yip-Kwai Lo, Thomas Edward Nowlin, Pradeep Pandurang Shirodkar, Mobil Oil CorporationfiledCriticalFrederick Yip-Kwai Lo
Priority to CA 2042961priorityCriticalpatent/CA2042961C/en
Publication of CA2042961A1publicationCriticalpatent/CA2042961A1/en
Application grantedgrantedCritical
Publication of CA2042961CpublicationCriticalpatent/CA2042961C/en
There is disclosed a supported olefin polymerization catalyst composition comprising a precursor and a catalyst activator. The precursor comprises a magnesium compound e.g., dibutylmagnesium, a cyclopentadienyl group - containing zirconium compound, and a titanic and/or a vanadium compound e.g., TiCl4, and an organic compound, e.g., an alcohol. The catalyst activator is a mixture of a conventional Ziegler/Natta co-catalyst and a zirconium sites activator, e.g., methylaluminumoxane. The catalyst is used in the preserve of small amounts of hydrogen to produce polymers having multimodal molecular weight distribution in a single reactor.
CA 20429611989-12-271991-05-21Catalyst composition and process for polymerizing polymers having multimodal molecular weight distribution
Expired - Fee RelatedCA2042961C
(en)
Catalyst with carrier for polimerization of ethylene and for co-polymerization of ethylene with alpha-olefines as well as process for producing said catalyst